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Motor Vibrations

I'm in the midst of tuning/upgrading a Well Tempered Classic. The original AC motor has a significant vibration, so I've been experimenting with the Origin Live DC motor and power supply. The OL motor vibrates fairly significantly, too, enough to be transmitted through the belt,platter and into the cartridge. I can also clearly feel the vibration in the belt whien I lightly touch it. I've experimented with different belts (the original rubber plus silk and nylon cords and dental floss) and found that the only way to reduce the vibration tranmitted to the cartridge is to loosen the belt tension to the point that there starts to be some "wow". Do all of you with DC motors experience vibration? If so, how much?

I suspect that I may have a bad motor, but the dealer tells me that the motors do vibrate to some degree. I could change over to Well Tempered's new AC motor which has some circuitry that is supposed to minimize vibration, cogging, etc. (See their website for details)

Any thoughts, suggestions, questions are welcomed.

Thanks
Jim
jimbo3

Showing 4 responses by twl

twl
3,251 posts
 
I don't know exactly where the problem lies Jim. But something is amiss.
twl
3,251 posts
 
I don't know what kind of DC motor you've got there Jimbo, but the Maxon DC motor in my Teres is totally vibrationless to the touch. I can't feel any vibration coming out of it. I think either that DC motor has a problem, or there is something else going on with it.

That's not a typical characteristic, for a good DC turntable grade motor to be vibrating like that. Something is wrong.
twl
3,251 posts
 
Maybe it is a bad motor, or maybe it has something to do with the power that you are feeding it. It needs to be dead flat DC.
twl
3,251 posts
 
If the OL motor is made by Maxon, it is a high quality motor, and should not cause this problem.

My Teres motor has no discernable vibrations on the housing that I can feel when it is running. However, I have battery power supply for it.

I have set up and auditioned an OL DC motor/controller system on another TT not too long ago, and did not notice this problem. But I didn't really look for it either. I'd get another kit from your dealer, just to make sure that it isn't some kind of defect in the kit, before you bail out on the OL package.
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